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英语改错Second,if a person cannot breathe,do your best to start

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/15 12:21:29
英语改错
Second,if a person cannot breathe,do your best to start his breathing at once,use a mouth to mouth way.答案是把use改为using,表伴随.但这样不就缺主语了吗?难道do your best to start his breathing at once是句子,可我再怎么看,do one'best to do sth.也是短语呀?
do your best to start his breathing at once是祈使句,祈使句一般是省略主语(you),表建议或命令的句子.这样能理解吗?相当于You should do your best to start his breathing at once..